MEDIUM
10th Manipur Board
IMPORTANT
Earn 100

What is Dobereiner's law of triads? Give one example.

Important Questions on Periodic Classification of Elements

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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 2
A, B and C are the elements in Dobereiner's triad. If the atomic mass of A is 40 and that of C is 137, what would be the atomic mass of B?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 3
What is Newlands' Laws of octaves? Explain with an example.
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these>Q 4
What were the limitations of Newlands' law of octaves?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these
What was Mendeleev's principle for the classification of elements?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these

Using Mendeleev's periodic table, predict the formula for the oxides of the following elements:

K, C, Al, Si, Ba.

MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his periodic table? (any two)
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Let us answer these
Give your reason why the noble gases are placed in a separate group.
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 1 - Periodic Classification of Elements>Activity 1.1.
Find out the element present in the Group1 of the periodic table.